The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sony FE 40mm F2.5 G and the Tamron 35mm F2.8 Di III OSD M1:2 for their suitability to various photography scenarios:
Size and Weight Comparison
The size of a lens is a crucial factor to consider when comparing two lenses. Tamron 35mm F2.8 Di III OSD M1:2 is the longer of the two lenses at 64mm. The Sony FE 40mm F2.5 G with a length of 45mm, is 19mm shorter. Besides being longer, the Tamron 35mm F2.8 Di III OSD M1:2 also has a larger diameter of 73mm compared to the Sony FE 40mm F2.5 G's 68mm diameter.
The weight of a lens is equally significant as its external dimensions, particularly if you intend to handhold your camera and lens combination for extended periods. Sony FE 40mm F2.5 G weighs 173g, which means it is 37g (17%) lighter than the Tamron 35mm F2.8 Di III OSD M1:2 which has a weight of 210g.
Filter Threads
The Sony FE 40mm F2.5 G has a filter size of 49mm whereas the Tamron 35mm F2.8 Di III OSD M1:2 has a 67mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 49mm filters that we recommend you to consider for the Sony FE 40mm F2.5 G:
And these are the 67mm filters that we recommend for the Tamron 35mm F2.8 Di III OSD M1:2:
Lens Mounts
Both the Sony FE 40mm F2.5 G and the Tamron 35mm F2.8 Di III OSD M1:2 has the same Sony E lens mount. Some of the latest released cameras that are compatible with the Sony E lenses are Sony FX5, Sony A7R VI and Sony A7 V.
Focal Range
Sony FE 40mm F2.5 G is a prime lens with fixed focal lenght of 40mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
60mm.
On the other hand, the Tamron 35mm F2.8 Di III OSD M1:2 is a prime lens with fixed focal lenght of 35mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 52.5mm.
